Medicine: Vigorous Middle Age

Dr. Thomas Kirk Cureton is a man of 49 who says he feels 35. It is no
idle boast. He can prove it with physical-fitness tests in which he
ranks consistently next to Track Stars Gil Dodds, 32, and Craig Dixon,
25.

Dr. Cureton, director of the Physical Fitness Research Laboratory at the
University of Illinois, has spent the last five years testing the
physical condition of 2,000 "middleaged" men (26 to 60, by his
classification) from a dozen or more professions and trades. He has put
more than 500 of them through a...